Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Capital Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2012	$ 9,051	$ 24,906	$ 95,687	$ 7,697	$ (9,295)	$ 128,046
Net income			13,183			13,183
Total other comprehensive (loss) income				(15,637)		(15,637)
Dividend declared:
Common stock			(4,915)			(4,915)
Purchase of Treasury Stock					(24)	(24)
Stock options exercised, including related tax effects		19	(49)		491	461
Recognition of stock based compensation expense		264	1			265
Restricted stock grants		(104)			104
Balance at Dec. 31, 2013	9,051	25,085	103,907	(7,940)	(8,724)	121,379
Net income			14,613			14,613
Total other comprehensive (loss) income				14,631		14,631
Dividend declared:
Common stock			(5,362)			(5,362)
Purchase of Treasury Stock					(8)	(8)
Stock options exercised, including related tax effects		43	(9)		582	616
Three-for-two stock split	4,526	(4,526)
Recognition of stock based compensation expense		418				418
Restricted stock grants		(115)			115
Balance at Dec. 31, 2014	13,577	20,905	113,149	6,691	(8,035)	146,287
Net income			15,153			15,153
Total other comprehensive (loss) income				(3,062)		(3,062)
Dividend declared:
Common stock			(6,040)			(6,040)
Purchase of Treasury Stock					(24)	(24)
Stock options exercised, including related tax effects		564	(2)		970	1,532
Recognition of stock based compensation expense		306				306
Restricted stock grants		(151)			151
Balance at Dec. 31, 2015	$ 13,577	$ 21,624	$ 122,260	$ 3,629	$ (6,938)	$ 154,152